What do i need to purchase to convert to LPG?

I wish to get a corgi registered person to convert my oven but i need to know what parts are needed to be replaced so i know what to buy before hand. (I'm assuming there will be jets, valves etc. Just need to know proper names etc)
I have a range cooker which is fully mains gas (2 ovens, Grill and 4 rings + griddle)
I am moving to a part of the country with no mains gas but do not want to give up my oven!!!
Please can anyone tell me exactly what i am looking for so i can start looking for the parts and adding up the cost.
The oven is a Leisure Rangemaster.
I know its a big job and I know it can be done i just need to know exactly which bits to replace.